Demented fanfic "at the top of lung!"

You don't have to be a gamer (I'm not); you don't even have to be a fanfic writer (I am, though not a slavishly fan-geeky one) to appreciate the demented goofiness of this video clip. My understanding is that some person or persons stumbled upon this fanfic set in the world of the video game Half Life 2, and found it so hysterical that they couldn't resist making an video that took all its moronic weirdnesses to their literalistic extremes. This silly thing can reduce me to helpless gibbering laughter. You have been warned.